Patents by Inventor Hisashi Miyazawa

Hisashi Miyazawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10655029
    Abstract: An inkjet ink including: a stilbene-based compound represented by General Formula (1) below; where in the General Formula (1), R1 and R3 each independently represent, for example, an alkyl group including 1 to 20 carbon atoms, an alkenyl group including 1 to 20 carbon atoms, a phenyl group, or a naphthyl group.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: May 19, 2020
    Assignees: Ricoh Company, Ltd., Tokyo University of Science Foundation
    Inventors: Takuya Fujita, Yoshimasa Miyazawa, Hisashi Habashi, Tatsuya Tomura, Tomohiro Inoue, Yukishige Kondo, Yutaka Takahashi
  • Patent number: 10300706
    Abstract: An inkjet printing device includes an ink containing a silver particle and water; and an ink discharging head including multiple nozzles to discharge the ink, individual liquid chambers communicating with the multiple nozzles, a common liquid chamber to supply the ink to the individual liquid chambers, a circulating flow path communicating with the individual liquid chambers, a common circulating liquid chamber communicating with the circulating flow path, and a pressure generator to apply a pressure to the ink in the individual liquid chambers, wherein the proportion of the silver particle to the ink is from 1 to 15 percent by mass.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: May 28, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshimasa Miyazawa, Tatsuya Tomura, Takuya Fujita, Hisashi Habashi, Takahiro Yoshida
  • Patent number: 10093104
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: October 9, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Minoru Usui, Hisashi Miyazawa
  • Publication number: 20170021632
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
    Type: Application
    Filed: October 5, 2016
    Publication date: January 26, 2017
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Minoru USUI, Hisashi MIYAZAWA
  • Patent number: 9475296
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: October 25, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Minoru Usui, Hisashi Miyazawa
  • Patent number: 9393788
    Abstract: A wiper device of a printer has four wiper units arranged in a line to wipe the nozzle faces of an inkjet head. Each wiper unit has a first intermittent gear and a second intermittent gear which sequentially mesh with first and second drive gears and sequentially transverse axis X a wiping operation and a cleaning operation. The wipers move vertically to the nozzle faces. A wiper cleaner lever rocks between a closed position covering the wiper and an open position not touching the wiper, moves through a path not interfering with the wiper in an opening operation, and through a path wiping the wiper and removing ink and other accretions from the wiper in a closing operation.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: July 19, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Hisashi Miyazawa
  • Publication number: 20160129695
    Abstract: A wiper device of a printer has four wiper units arranged in a line to wipe the nozzle faces of an inkjet head. Each wiper unit has a first intermittent gear and a second intermittent gear which sequentially mesh with first and second drive gears and sequentially transverse axis X a wiping operation and a cleaning operation. The wipers move vertically to the nozzle faces. A wiper cleaner lever rocks between a closed position covering the wiper and an open position not touching the wiper, moves through a path not interfering with the wiper in an opening operation, and through a path wiping the wiper and removing ink and other accretions from the wiper in a closing operation.
    Type: Application
    Filed: January 13, 2016
    Publication date: May 12, 2016
    Inventor: Hisashi MIYAZAWA
  • Publication number: 20160067976
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
    Type: Application
    Filed: November 13, 2015
    Publication date: March 10, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Minoru USUI, Hisashi MIYAZAWA
  • Patent number: 9266335
    Abstract: A wiper device of a printer has four wiper units arranged in a line to wipe the nozzle faces of an inkjet head. Each wiper unit has a first intermittent gear and a second intermittent gear which sequentially mesh with first and second drive gears and sequentially transverse axis X a wiping operation and a cleaning operation. The wipers move vertically to the nozzle faces. A wiper cleaner lever-rocks between a closed position covering the wiper and an open position not touching the wiper, moves through a path not interfering with the wiper in an opening operation, and through a path wiping the wiper and removing ink and other accretions from the wiper in a closing operation.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: February 23, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Hisashi Miyazawa
  • Patent number: 9233542
    Abstract: A wiper device enables to wipe selectively the unit heads to of an inkjet head has a simple, compact construction. The wiper device of a printer has four wiper units arranged in a line. When a drive shaft turns based on rotation of a wiper motor, the four wiper units operate sequentially from one end to the other in an outbound operating sequence, and operate sequentially in the reverse order in a return operating sequence. Four head units each have a row of unit heads, and a row of unit heads. The four wiper units can move to a position enabling wiping unit heads, and a position enabling wiping unit heads.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: January 12, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Hisashi Miyazawa
  • Patent number: 9199474
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the-movement of the carriage.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: December 1, 2015
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Minoru Usui, Hisashi Miyazawa
  • Patent number: 9168753
    Abstract: A maintenance device for a fluid ejection head has a small, compact switching mechanism that can appropriately switch drive force from a drive source and drive a suction pump and a wiper. A maintenance device 40 has caps 64 (1) to 65 (4) and wipers 75 (1) to 75 (4), a suction pump 94 that suctions waste ink from the caps 64 (1) to 65 (4), a cap drive transfer mechanism 80 that moves the caps 64 (1) to 65 (4) in a cap movement direction V, a wiper-pump drive transfer mechanism 90 that moves the wipers and drives the suction pump 94, and a drive switching mechanism 100 that switches driving by the wiper-pump drive transfer mechanism 90 to drive the suction pump 94 or move the wipers according to the position of cap movement.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: October 27, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Hisashi Miyazawa
  • Publication number: 20150251433
    Abstract: A wiper device enables to wipe selectively the unit heads to of an inkjet head has a simple, compact construction. The wiper device of a printer has four wiper units arranged in a line. When a drive shaft turns based on rotation of a wiper motor, the four wiper units operate sequentially from one end to the other in an outbound operating sequence, and operate sequentially in the reverse order in a return operating sequence. Four head units each have a row of unit heads, and a row of unit heads. The four wiper units can move to a position enabling wiping unit heads, and a position enabling wiping unit heads.
    Type: Application
    Filed: February 26, 2015
    Publication date: September 10, 2015
    Inventor: Hisashi MIYAZAWA
  • Publication number: 20150251432
    Abstract: A wiper device of a printer has four wiper units arranged in a line to wipe the nozzle faces of an inkjet head. Each wiper unit has a first intermittent gear and a second intermittent gear which sequentially mesh with first and second drive gears and sequentially transverse axis X a wiping operation and a cleaning operation. The wipers move vertically to the nozzle faces. A wiper cleaner lever-rocks between a closed position covering the wiper and an open position not touching the wiper, moves through a path not interfering with the wiper in an opening operation, and through a path wiping the wiper and removing ink and other accretions from the wiper in a closing operation.
    Type: Application
    Filed: March 9, 2015
    Publication date: September 10, 2015
    Inventor: Hisashi MIYAZAWA
  • Publication number: 20140368586
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the-movement of the carriage.
    Type: Application
    Filed: September 3, 2014
    Publication date: December 18, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Minoru USUI, Hisashi MIYAZAWA
  • Patent number: 8888234
    Abstract: Provided is a fluid ejecting apparatus including: a linear absorbing member which is disposed so as to face two or more nozzle rows adjacent to each other in a direction intersecting an extension direction of the nozzle rows while extending from one end of the nozzle row in the extension direction and being reversed at the other end thereof and to be turned back in a manner of reciprocating at least once in the extension direction, and absorbs the fluid ejected from the nozzles; a first movement mechanism which moves the absorbing member in a direction intersecting the extension direction of the nozzle row; and a second movement mechanism which moves the absorbing member while turning back the absorbing member so as to reciprocate at least once in the extension direction of the nozzle row.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: November 18, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Takato Hayashi, Hisashi Miyazawa
  • Patent number: 8882253
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: November 11, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Minoru Usui, Hisashi Miyazawa
  • Patent number: 8820888
    Abstract: Provided is a fluid ejecting apparatus including: a plurality of nozzle rows which is arranged in the direction intersecting the extension direction of nozzles; a linear absorbing member which is suspended while being parallel to the nozzle rows or inclined with respect to the nozzle rows at a predetermined angle; a first movement section which relatively moves at least one of the absorbing member and the nozzle rows in the direction intersecting the nozzle rows; and a control section which performs a flushing process in which a fluid is selectively ejected from the nozzles facing the absorbing member toward the absorbing member while moving the absorbing member using the first movement section.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: September 2, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Takato Hayashi, Hisashi Miyazawa
  • Publication number: 20140210907
    Abstract: A maintenance device for a fluid ejection head has a small, compact switching mechanism that can appropriately switch drive force from a drive source and drive a suction pump and a wiper. A maintenance device 40 has caps 64 (1) to 65 (4) and wipers 75 (1) to 75 (4), a suction pump 94 that suctions waste ink from the caps 64 (1) to 65 (4), a cap drive transfer mechanism 80 that moves the caps 64 (1) to 65 (4) in a cap movement direction V, a wiper-pump drive transfer mechanism 90 that moves the wipers and drives the suction pump 94, and a drive switching mechanism 100 that switches driving by the wiper-pump drive transfer mechanism 90 to drive the suction pump 94 or move the wipers according to the position of cap movement.
    Type: Application
    Filed: September 20, 2012
    Publication date: July 31, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Hisashi Miyazawa
  • Publication number: 20140009542
    Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 9, 2014
    Inventors: Minoru USUI, Hisashi MIYAZAWA